[PATCH V6 1/7] drivers: perf: arm_pmu: Add new sched_task() callback
From: Anshuman Khandual <hidden>
Date: 2022-12-08 08:44:56
Also in:
linux-perf-users, lkml
Subsystem:
arm pmu profiling and debugging, the rest · Maintainers:
Will Deacon, Mark Rutland, Linus Torvalds
This adds armpmu_sched_task(), as generic pmu's sched_task() override which in turn can utilize a new arm_pmu.sched_task() callback when available from the arm_pmu instance. This new callback will be used while enabling BRBE in ARMV8 PMU. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual <redacted> --- drivers/perf/arm_pmu.c | 9 +++++++++ include/linux/perf/arm_pmu.h | 1 + 2 files changed, 10 insertions(+)
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index 3f07df5a7e95..66880a4bb248 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c@@ -520,6 +520,14 @@ static int armpmu_event_init(struct perf_event *event) return __hw_perf_event_init(event); } +static void armpmu_sched_task(struct perf_event_context *ctx, bool sched_in) +{ + struct arm_pmu *armpmu = to_arm_pmu(ctx->pmu); + + if (armpmu->sched_task) + armpmu->sched_task(ctx, sched_in); +} + static void armpmu_enable(struct pmu *pmu) { struct arm_pmu *armpmu = to_arm_pmu(pmu);
@@ -877,6 +885,7 @@ static struct arm_pmu *__armpmu_alloc(gfp_t flags) } pmu->pmu = (struct pmu) { + .sched_task = armpmu_sched_task, .pmu_enable = armpmu_enable, .pmu_disable = armpmu_disable, .event_init = armpmu_event_init,
diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index 0356cb6a215d..60d4e4c9b3ea 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h@@ -101,6 +101,7 @@ struct arm_pmu { void (*reset)(void *); int (*map_event)(struct perf_event *event); int (*filter_match)(struct perf_event *event); + void (*sched_task)(struct perf_event_context *ctx, bool sched_in); int num_events; bool secure_access; /* 32-bit ARM only */ #define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40
--
2.25.1
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